import random
from urllib.request import urlopen 
import sys 

WORD_URL="http://learncodethehardway.org/words.txt"
WORDS=[]

PHRASES={
    "class %%%(%%%):":
     "Make a class named %%% that is-a %%%.",
    "class %%%(object):\n\tdef __init__(self,***)":
     "class %%% has-a __init__ that takes self and *** params.",
    "*** = %%%()":
     "Set *** to an instance of class %%%.",
    "***.***(@@@)":
     "Form *** get the *** function,call it with params self, @@@.",
    "***.*** = '***'":
     "From *** get the *** attribute and set it to '***'."
}

if len(sys.argv) ==2 and sys.argv[1] == "english":
    PHRASES_FIRST=True 
else:
    PHRASES_FIRST=False

for word in urlopen(WORD_URL).readlines():
    WORDS.append(str(word.strip(),encoding="utf-8"))

def convert(snippet,phrase):
    class_names=[w.capitalize() for w in random.sample(WORDS,snippet.count("%%%"))]
    other_names=random.sample(WORDS,snippet.count("***"))
    results=[]
    param_names=[]

    for i in range(0,snippet.count("@@@")):
        param_count=random.randint(1,3)
        param_names.append(', '.join(random.sample(WORDS,param_count)))

    for sentence in snippet,phrase:
        result=sentence[:]

        for word in class_names:
            result=result.replace("%%%",word,1)
        for word in other_names:
            result=result.replace("***",word,1)

        for word in param_names:
            result=result.replace("@@@",word,1)

        results.append(result)
    return results

try:
    while True:
        snippets=list(PHRASES.keys())
        random.shuffle(snippets)

        for snippet in snippets:
            phrase=PHRASES[snippet]
            question,answer=convert(snippet,phrase)
            if PHRASES_FIRST:
                question,answer=answer,question
            
            print(question)

            input("> ")
            print(f"ANSWER: {answer}\n\n")
except EOFError:
    print("\nBye")
